Research Progress of Wavelet Analysis in Flow Structure Characterization

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Abstract:

The wavelet analysis is a time-frequency analysis method, which plays an important role in processing non-stationary signals obtained by Particle Image Velocimetry (PIV) to measure turbulent flow fields. Current research status for wavelet analysis in the flow field structure was reviewed: eduction of coherent structures and multi-scale structures(the large-, intermediate- and relatively small-scale structures)by wavelet transform and combine with the maximum energy criterion, extraction of coherent vortical structures and analysis of multi-scale turbulent structures information from the time–frequency diagram. Application of wavelet analysis in the flow structures was also prospected.

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Advanced Materials Research (Volumes 291-294)

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2787-2793

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July 2011

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© 2011 Trans Tech Publications Ltd. All Rights Reserved

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